Static structures (e.g. – buildings) – With component having discrete prestressing means – Beam – girder – or truss construction
Patent
1974-11-18
1976-04-06
Abbott, Frank L.
Static structures (e.g., buildings)
With component having discrete prestressing means
Beam, girder, or truss construction
52230, 238 85, 238115, E04C 508
Patent
active
039480100
ABSTRACT:
The invention relates to the technique of prestressed concrete and concerns a reinforcing device comprising a cylindrical metal tube at the ends of which are friction welded two plates or flanges defining radial support surfaces for bearing on the concrete. One of these plates constitutes an end wall against which abuts a metal core for putting the tube under tension. The other plate, which has a centre aperture, comprises means such as screw threading which co-operates with a bolt for achieving said tensioning in an effective and easy manner. Preferably, the tube has a section which varies along its longitudinal axis so as to afford an improved guide for the core and improve the characteristics of the reinforcement. A particularly advantageous application is in the manufacture of composite railway ties.
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Abbott Frank L.
Braun Leslie A.
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